Steel SUP9 Annealed vs SUP9 Normalized
Steel · SUP9 temper comparison
SUP9 Annealed and SUP9 Normalized are two conditions of the same steel grade, SUP9: Annealed versus Normalized. The chemistry is identical, so every difference below comes from the condition. SUP9 Normalized is the stronger of the two: yield strength 530 MPa (76.9 ksi) against 440 MPa (63.8 ksi) for SUP9 Annealed, about 20% more; tensile strength follows at 960 MPa (139 ksi) vs 760 MPa (110 ksi). In exchange, SUP9 Annealed is the more ductile: elongation 22% versus 17% for SUP9 Normalized, and SUP9 Normalized is harder (269 HB vs 217 HB). SUP9 Normalized runs hotter in service (400°C vs 250°C continuous). On the shop floor, SUP9 Annealed machines more easily (good vs fair).
SUP9 AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
SUP9 NormalizedChoose it when strength drives the design, or when the part sees heat.
SUP9 Annealed vs SUP9 Normalized: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all steel grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all steel grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 206 GPa29.9 Msi · Shear Modulus 79 GPa11.5 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,420°C2,588 °F · Liquidus Temperature 1,490°C2,714 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12.3 µm/m·K6.8 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Min Service Temperature -40°C-40 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 7.8 % IACS · Electrical Resistivity 2.2×10⁻⁷ Ω·m8.66 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.62 V · Corrosion Resistance 11 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Brazeability / Solderability 50 / 100 · Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 26 MJ/kg11,178 BTU/lb · Embodied Carbon (primary production) 2 kg CO₂/kg · Embodied Water 55 L/kg6.6 gal/lb · Typical Recycled Content 30%
Strength versus weight
Yield strength against density for every steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
SUP9 Annealed vs SUP9 Normalized — frequently asked
Is SUP9 Normalized stronger than SUP9 Annealed?
Yes. SUP9 Normalized has a typical yield strength of 530 MPa (76.9 ksi) against 440 MPa (63.8 ksi) for SUP9 Annealed — about 20% more. Tensile strength is 960 MPa (139 ksi) vs 760 MPa (110 ksi).
Which condition does FabDigit quote by default, Annealed or Normalized?
Annealed is the default SUP9 condition in the FabDigit quote flow. The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
Which is easier to machine, SUP9 Annealed or SUP9 Normalized?
SUP9 Annealed. Its machinability rates good (55/100) against fair (45/100) for SUP9 Normalized; for welding the order is SUP9 Annealed first (poor, 30/100) then SUP9 Normalized (poor, 25/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in SUP9 Annealed and SUP9 Normalized side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.